Block Ads on Hulu via UserScript

Hulu-AdBlocker.user.js

// ==UserScript==
// @name        Hulu AdBlocker
// @namespace   https://gist.github.com/t0rr3sp3dr0
// @version     0.0.1
// @author      t0rr3sp3dr0
// @description Block Ads on Hulu
// @updateURL   https://gist.github.com/t0rr3sp3dr0/af7824f6968e5190d276507fa7ac603c/raw
// @downloadURL https://gist.github.com/t0rr3sp3dr0/af7824f6968e5190d276507fa7ac603c/raw
// @match       https://www.hulu.com/*
// @run-at      document-end
// @grant       GM_addStyle
// ==/UserScript==

if (!GM_addStyle)
    GM_addStyle = css => {
        const style = document.createElement('style');
        style.type = 'text/css';
        style.innerHTML = css;

        document.head.appendChild(style);
    };

(() => {
    GM_addStyle(`
        .AdPlayer {
            display: none !important;
        }
    `);

    const installedAdBlockers = {
        null: true,
        undefined: true,
    };

    const installAdBlocker = () => {
        const ph = document.querySelector('.Timeline__playhead');
        if (installedAdBlockers[ph])
            return;

        new MutationObserver(mutations => mutations.forEach(mutation => {
            if (mutation.target.classList.contains('Timeline__playhead--ad'))
                document.querySelector('#content-video-player').play();
        }))
            .observe(
                ph,
                {
                    attributes: true,
                },
            );

        installedAdBlockers[ph] = true;
    };

    setInterval(installAdBlocker, 1000);
})();